Paul Hirose wrote:

I heard SAM 28000 on Friday afternoon as they were talking to Joshua
Approach in Southern California on 124.55 MHz, inbound to Pt. Mugu.
The pilot pronounced the callsign "Sam Two Eight Thousand". Joshua
routed them via the Palmdale VORTAC, descending to 14,000 then 7,000
feet before instructing them to contact Socal Approach.

That 747 must have an unusually powerful transmitter. The signal I
heard was the epitome of "loud and clear".

I've heard them several times over the years on HF and VHF, and indeed,
they have some powerful transmitters.

Steve
Holland, MI
Drake R7, R8 and R8B

http://www.iserv.net/~n8kdv/dxpage.htm